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AU509797B2 - Coarse-scan/fine-print character reproduction - Google Patents
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AU509797B2 - Coarse-scan/fine-print character reproduction - Google Patents

Coarse-scan/fine-print character reproduction

Info

Publication number
AU509797B2
AU509797B2 AU32230/78A AU3223078A AU509797B2 AU 509797 B2 AU509797 B2 AU 509797B2 AU 32230/78 A AU32230/78 A AU 32230/78A AU 3223078 A AU3223078 A AU 3223078A AU 509797 B2 AU509797 B2 AU 509797B2
Authority
AU
Australia
Prior art keywords
coarse
scan
fine
print character
character reproduction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU32230/78A
Other versions
AU3223078A (en
Inventor
B. R. and Wong KY Schatz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of AU3223078A publication Critical patent/AU3223078A/en
Application granted granted Critical
Publication of AU509797B2 publication Critical patent/AU509797B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/005—Statistical coding, e.g. Huffman, run length coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
AU32230/78A 1977-03-31 1978-01-06 Coarse-scan/fine-print character reproduction Expired AU509797B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/783,375 US4124870A (en) 1977-03-31 1977-03-31 Method for improving print quality of coarse-scan/fine-print character reproduction
USUS783375 1977-03-31

Publications (2)

Publication Number Publication Date
AU3223078A AU3223078A (en) 1979-07-12
AU509797B2 true AU509797B2 (en) 1980-05-22

Family

ID=25129057

Family Applications (1)

Application Number Title Priority Date Filing Date
AU32230/78A Expired AU509797B2 (en) 1977-03-31 1978-01-06 Coarse-scan/fine-print character reproduction

Country Status (7)

Country Link
US (1) US4124870A (en)
JP (1) JPS5932026B2 (en)
AU (1) AU509797B2 (en)
CA (1) CA1121902A (en)
ES (1) ES468341A1 (en)
GB (1) GB1595003A (en)
SE (1) SE7803537L (en)

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322716A (en) * 1976-11-15 1982-03-30 Environmental Research Institute Of Michigan Method and apparatus for pattern recognition and detection
US4204232A (en) * 1977-07-08 1980-05-20 Nippon Electric Co., Ltd. Pattern transmission system comprising an encoder for encoding partial thinned patterns in two scanning lines along only one boundary line
JPS54150022A (en) * 1978-05-18 1979-11-24 Ricoh Co Ltd Method and apparatus for picture encoding reproduction
GB2030823B (en) * 1978-10-02 1982-11-03 Ibm Image data manipulation apparatus
JPS55112076A (en) * 1979-02-22 1980-08-29 Ricoh Co Ltd Predictive restoration method for high-density picture element
JPS55162179A (en) * 1979-06-02 1980-12-17 Ricoh Co Ltd Picture processing method
US4280144A (en) * 1979-12-03 1981-07-21 International Business Machines Corporation Coarse scan/fine print algorithm
DE3002781A1 (en) * 1980-01-26 1981-07-30 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel METHOD FOR IMPROVED IMAGE REPRODUCTION IN REPRODUCTION TECHNOLOGY
JPS5725771A (en) * 1980-07-23 1982-02-10 Canon Inc Picture signal processor
US4389672A (en) * 1981-02-02 1983-06-21 Bell Telephone Laboratories, Incorporated Display of pseudo-gray scale picture signals on multilevel displays
WO1983002377A1 (en) * 1981-12-25 1983-07-07 SAITO, Masayuki; Recording picture processing system
JPS58202447A (en) * 1982-04-26 1983-11-25 Fujitsu Ltd Forming system of dot image
US4825451A (en) * 1982-10-11 1989-04-25 Niravoice, Inc. Technique for transmission of voice communications and apparatus useful therein
JPS6038973A (en) * 1983-08-11 1985-02-28 Dainippon Screen Mfg Co Ltd Processing method of boundary picture element
US4878250A (en) * 1983-10-12 1989-10-31 Canon Kabushiki Kaisha Image processing system
JPS61203785A (en) * 1985-03-07 1986-09-09 Dainippon Screen Mfg Co Ltd Method and device for smoothing binary picture data
US5038378A (en) * 1985-04-26 1991-08-06 Schlumberger Technology Corporation Method and apparatus for smoothing measurements and detecting boundaries of features
US4745473A (en) * 1986-03-24 1988-05-17 Harris Corporation Hybrid image compression system
US4903317A (en) * 1986-06-24 1990-02-20 Kabushiki Kaisha Toshiba Image processing apparatus
USH996H (en) 1987-01-20 1991-11-05 Recognition Equipment Incorporated High resolution page image display system
US4785356A (en) * 1987-04-24 1988-11-15 International Business Machines Corporation Apparatus and method of attenuating distortion introduced by a predictive coding image compressor
EP0296608B1 (en) * 1987-06-25 1996-01-03 Nec Corporation Encoding of a picture signal in consideration of contrast in each picture and decoding corresponding to the encoding
US4791679A (en) * 1987-12-26 1988-12-13 Eastman Kodak Company Image character enhancement using a stroke strengthening kernal
US4920501A (en) * 1988-10-19 1990-04-24 Eastman Kodak Company Digital halftoning with minimum visual modulation patterns
US5056154A (en) * 1988-11-07 1991-10-08 Sharp Kabushiki Kaisha Text image data compression system
JPH02162475A (en) * 1988-12-15 1990-06-22 Dainippon Screen Mfg Co Ltd Picture contour correcting method
US4970604A (en) * 1989-04-14 1990-11-13 Coueignoux Philippe J Screen display enhancing system
US7382929B2 (en) 1989-05-22 2008-06-03 Pixel Instruments Corporation Spatial scan replication circuit
US5060284A (en) * 1990-03-23 1991-10-22 Eastman Kodak Company Adaptive error diffusion thresholding for document images
US5227895A (en) * 1990-08-03 1993-07-13 Scitex Corporation Ltd. Method and apparatus for image reproduction
GB2249910B (en) * 1990-11-19 1994-11-30 Le Proizv Ob Poligraficheskogo Method of and apparatus for making a half-tone reproduction of an image
JP2543267B2 (en) * 1990-11-21 1996-10-16 松下電送株式会社 Image reduction device and image display device
DE69231481T2 (en) * 1991-07-10 2001-02-08 Fujitsu Ltd., Kawasaki Imaging device
US5486927A (en) * 1991-08-19 1996-01-23 Konica Corporation Digital image forming apparatus using subdivided pixels
US5815605A (en) * 1992-07-17 1998-09-29 Ricoh Company, Ltd. Image processing system and method
US5444552A (en) * 1992-09-28 1995-08-22 Xerox Corporation Method for compressing, processing, and storing grayscale bitmaps
US6680782B1 (en) 1993-06-30 2004-01-20 Nexpress Solutions Llc Method and apparatus of using a raster image processor and interpolator to increase the speed of operation and reduce memory requirements for electronic printing
US6118457A (en) * 1993-10-28 2000-09-12 Canon Kabushiki Kaisha Resolution conversion with preservation of fine lines and of hue
US5778105A (en) * 1994-01-14 1998-07-07 R.R. Donnelley & Sons Company Method of and apparatus for removing artifacts from a reproduction
US5659634A (en) * 1994-09-29 1997-08-19 Xerox Corporation Apparatus and method for encoding and reconstructing image data
US5682250A (en) * 1994-12-20 1997-10-28 Xerox Corporation Method and apparatus for reproducing an image without salt and pepper specks
US6212304B1 (en) * 1998-07-06 2001-04-03 Intel Corp. Method and apparatus for imaging processing
US6437872B1 (en) 1998-09-22 2002-08-20 Xerox Corporation Multibit screening of print documents in a PDL environment
JP2000217000A (en) * 1998-11-19 2000-08-04 Murata Mach Ltd Image processor, image processing method and recording medium
US6683702B1 (en) 1999-07-07 2004-01-27 Xerox Corporation Compact-dot reproduction of scanned halftone screens
JP3857611B2 (en) * 2002-05-20 2006-12-13 富士通株式会社 Data compression program, data compression method, and data compression apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462547A (en) * 1966-09-06 1969-08-19 Stanford Research Inst Data processing system for signals obtained from a video scanner
US3573789A (en) * 1968-12-13 1971-04-06 Ibm Method and apparatus for increasing image resolution
US3980809A (en) * 1973-07-16 1976-09-14 International Business Machines Corporation Encoding logic for reduced bandwidth pictorial data transmission system
US3977007A (en) * 1975-06-02 1976-08-24 Teletype Corporation Gray tone generation
US3984626A (en) * 1975-08-01 1976-10-05 Bell Telephone Laboratories, Incorporated Picture signal coder
IT1055651B (en) * 1975-11-03 1982-01-11 Elsag ELECTRONIC SYSTEM FOR READING SYMBOLS

Also Published As

Publication number Publication date
JPS53122311A (en) 1978-10-25
CA1121902A (en) 1982-04-13
US4124870A (en) 1978-11-07
SE7803537L (en) 1978-10-01
AU3223078A (en) 1979-07-12
GB1595003A (en) 1981-08-05
JPS5932026B2 (en) 1984-08-06
ES468341A1 (en) 1978-11-16

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